Automatic safety gas-valve.



G. w. BOWMAN.

AUTOMATIC SAFETY GAS VALVE.

APPLICATION FILED JAN. 22, 1907.

Patented Dec. 15, 1908.

IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII f M 4 f 0 l M ML 1 NM no atto'onugb GILBERTWALTER BOWMAN, or CUMBERLAND GEORGE EDWARD GRAY, ONE-SIXTH TO CHAR i v'ro NATHAN WILLIAM DANFQRTH, ALL or CUMBERLAND, MARYLAND.

, lo all whom it ma concern:

"UNITED STATES PATENT AUTOMATIC SAFETY GAS-VALVE.

" Be it known, t atI, GILBERT .VVALTER BOWMAN, a citizen of the United States, re-

siding at Cumberland, in the county .of'

Allegany and State of Maryland, have invente a new and useful Improvement in Automatic Safety Gas-Valves of which the following i a specification.

This invention relates to gas valves and more particularly to automatic safety gas valves, the object being to provide a valve which will prevent the gas from escaping in case the pressure leaves the main and returns without being noticed.

Another object of my invention is to rovide a valve that will automatically close .from an over pressure of gas so as to prevent the meter from exploding.

Another object of m invention is to provide an automatic va ve that will remain 0 en under an ordinary pressure, but will c ose ifthe pressure becomes too great to be dangerous, or if the pressure gets low enough to ut out the blaze.

"ith these and other'objects in view, the invention consists inthe novel features of construction, combination and. arrangement of parts, hereinafter fully described and pointed out in the claims.

- In the drawings forming a part of this specification: Figure 1 is a longltudinal sectional view through my improved gas valve showing the same opened. Fig. 2 is a longitudinal sectional view of the-valve showing it closed by the pressure becoming too great. In the drawing A indicates a supply pipe on the ends of which is secured a four-way joint A having a valve casing B, secured in the upper port provided with a cap B having) a central opening inwhich is arranged a ru ber washer through which works the stem C of a valve'C, for the purpose hereinafter fully described.

A plug A is secured in one of the horizontal ports of the joint A and in the opposite ort the end of a pipe D issecured, on whici is mounted a housing E carrying a delivery valve casing F, at one end, which is of a greater length than the height of the housing and to the lower end of which is connected the end of the pipe I). An outlet 1pipe G is The lower end of the ma F isacl'osedliy a plug so that it can be readily cleaned when L2 desired. Secured in the upper: portion 05 the casing is a plug H provided mth avert'ical bore H which is enlarged. as: showniat'I-Pyin which is'- mounted the enlarged portion I of a valve stem 1 which is-prov1ded with"a' valve I at its lower end adapted-tof-be seated in a valve seat J secured 1n.the casihg F under the-pipe D, so as.-.to, revent the gas from passing out of the pipeggzi i 'Ehestemrh is surrounded by a coil spring enlarged end and shoulder formedrby the bore, and extends upwardly through the bore H out through a rubber-washer secured in a central opening. in a cap F' se cured on the upper end of the-casing Fahd is provided wit an eye Iin its ends to which a chain or cable can be connected, so as to liftthe valve when desired;

A notch I is formed in the stem I in which the end of a pin K is adapted to fit and hold the valve up against the tension of the spring. The pin is slidabl mounted in a transverse bore which exten s through the plug casing,

and housing, and is loosely connected to the short arm of 'a lever L, which is pivotally mounted in the housing, the long arm of which is connectedto the end of a spring actuated-plunger M, mounted in a casm N supported in the housing by ribs N. T e plunger M is provided with a head M adapted to be engaged by the angled ends of the heads 0, P of pins 0 and P, which are mounted in the converging casin s Q, Q, supported in the housing by ribs 6. The pin 0 is sur- P betweenf the i L N -tbrib ifiefiii b ib LES HENRY SANDERS; KND

rounded by a coil-spring for returning the same after it has been pressed downwardly,

hereinafter fully described.

A lever R is pivotally mounted in the opened end of the housing E rovided with oppositely disposed arms R, 2 at one end adapted to engage the pins 0, and P and force the pin out of the valve stem and allow the spring to force the valve down into the seat, and close the same. The lever projects out of the end of the housing and is provided with a slot R in which is mounted a pin 0, secured in the eye formed in the end of the valve stem C so that when the valve C moves up or down, in the pipe, the lever will be rocked so as to throw either one of the arms R, R into engagement with the pin 0 or P,

which will engage the lunger head M, and draw the pin out of t e notch in the valve stem I. A weight T is mounted on the end of the leverR so that the valve can be set so being a is increased or decreased the valve as to operate it at any pressure desired.

The 0 eration is as follows: The valve C {usted to the amount of ressure in the supp the normal position as shown in Fig. 1,'th.e gas passing through the pipe D and easing F and out the outletpipe G. If the re ssure raised or lowered as the case may be, which will operate the lever and through the medium of thepin and lever, the pin K will be drawn out of the notch in the valve stem I, and allow the valve to be forced down into the seat J, and outof the outlet.

Having thus fully.described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a device of the kind described, the combination with a spring actuated cut off valve, of a plunger carrying tripping means adapted to engage said valve, pins normally engaging said plunger and a rocker lever provided with arms adapted to engage said pins.

2. In a device of the kind described, the combination with a spring actuated cut off valve, of a slidably mountedilocking pin adapted to engage said valve, a lever cony pipe which will holdt e valve in.

will be nected to'said pin, a plunger connected to said lever, slidably mounted pins normally engagin said plunger and a rocker lever provide with arms adapted to engage said pins, for the purpose described.

3. In a device of the kind-described, the

combination with a delivery valve casing, of

a spring a ctuated valve mounted in said casin a supply valve casing connected to said de ivery casing, a regulating valve mounted in said casing, a slidably mounted locking pin adapted to engage said delivery valve, tripping means connected to said pin, and a lever connected to said regulating valve, adapted to engage said tripping means, for

the purpose described.

GILBERT WALTER BOWMAN.

Witnesses:

GEO. E. GRAY, OHARLEY H. SANDERS. 

